128771711 has 2 divisors, whose sum is σ = 128771712. Its totient is φ = 128771710.

The previous prime is 128771701. The next prime is 128771767. The reversal of 128771711 is 117177821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128771711 - 2⁶ = 128771647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128771701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64385855 + 64385856.

It is an arithmetic number, because the mean of its divisors is an integer number (64385856).

Almost surely, 2^128771711 is an apocalyptic number.

128771711 is a deficient number, since it is larger than the sum of its proper divisors (1).

128771711 is an equidigital number, since it uses as much as digits as its factorization.

128771711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5488, while the sum is 35.

The square root of 128771711 is about 11347.7623785485. The cubic root of 128771711 is about 504.9791985681.

The spelling of 128771711 in words is "one hundred twenty-eight million, seven hundred seventy-one thousand, seven hundred eleven".